Balancing chemical equations

Front

What is the Law of Conservation of Mass?

Back

It states that no matter can be created or destroyed.

Front

Balance this equation: HgO ---> 2Hg + O₂

Back

2HgO ---> 2Hg + O₂

Front

Balance this equation: H₂ + Cl₂ ---> HCl

Back

H₂ + Cl₂ ---> 2HCl

Front

How many Mn atoms are found in the compound 2MnO₄?

Back

2

Front

What is the total number of atoms present in 5Na₃PO₄?

Back

40

Front

What does it mean to balance a chemical equation?

Back

It means to ensure that the number of atoms for each element is the same on both sides of the equation.

Front

What is a reactant in a chemical reaction?

Back

A substance that is consumed during the reaction.

Front

What is a product in a chemical reaction?

Back

A substance that is produced as a result of the reaction.

Front

What is the coefficient in a chemical equation?

Back

A number placed in front of a compound to indicate how many molecules are involved.

Front

What is the purpose of balancing chemical equations?

Back

To comply with the Law of Conservation of Mass.